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Method for extracting tungsten from low-grade ferberite

A low-grade tungsten ore technology, applied in the field of tungsten extraction, can solve the problems of difficult industrialization, complex leaching conditions, and easy sintering of materials, and achieve the effects of simplifying the leaching process, good material fluidity, and simplified processes

Active Publication Date: 2020-01-03
GANZHOU NONFERROUS METALLURGICAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of long process, complex operation, easy sintering of materials, complex leaching conditions and difficulty in industrialization when extracting tungsten from low-grade wolframite in the existing technology

Method used

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  • Method for extracting tungsten from low-grade ferberite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 100g tungsten ore into an electromagnetic sample preparation crusher. After processing, the tungsten ore will become powder with a particle size of about 100μm. Add 0.20 times the amount of soda ash, 0.03 times the magnesium chloride and 0.11 times the sodium chloride. , Mix the auxiliary materials and the finely ground ore sample evenly, heat it to 780℃ in a Maffei furnace, keep it for 60 minutes, and cool down with the furnace, and process it into a particle size of 100-150μm with an electromagnetic sample preparation crusher. Hour 2 minutes 45 seconds, ultrasonic water immersion, leaching in a water bath at 70 ℃ for 45 minutes, the leaching liquid solid ratio is 3:1 (mL / g), filtering and analyzing the content of silicon and phosphorus impurities in the filtrate, the result is Si: 8.21mg / L, P: 6.28mg / L. The filter cake is washed once with 1.5 times the water, the filter residue is dried and weighed, and the WO in it is sampled and analyzed 3 Content, and calculat...

Embodiment 2

[0047] Weigh 100g tungsten ore and pour it into an electromagnetic sample preparation crusher. After processing, the tungsten ore will become powder with a particle size of about 100μm. Add 0.22 times the amount of soda ash, 0.10 times sodium chlorate and 0.05 times magnesium chloride. , Mix the auxiliary materials and the finely ground ore sample evenly, heat it to 800 ℃ in a Maffei furnace, and keep it for 30 min. After cooling with the furnace, use an electromagnetic sample preparation crusher to process it to a particle size of 100-150 μm. At 2 minutes and 30 seconds, add the tungsten-containing leaching solution of Example 1 for ultrasonic cycling leaching, fine-tune the pH to 9-10 with dilute hydrochloric acid, leaching for 30 minutes at 75°C in a water bath, the leaching liquid-to-solid ratio is 3:1 (mL / g), filter and filter The cake is washed once with 1.5 times of water, the filter residue is dried and weighed, and the WO in it is sampled and analyzed 3 Content, and cal...

Embodiment 3

[0052] Weigh 100g tungsten ore into an electromagnetic sample preparation grinder, process the tungsten ore into powder with a particle size of about 100μm, add 0.18 times the amount of soda ash, 0.12 times sodium sulfate and 0.05 times magnesium sulfate , The auxiliary materials and the finely ground ore sample are mixed uniformly, heated to 850 ℃ in a Maffei furnace, and kept for 45 minutes. After cooling with the furnace, they are processed into a particle size of 100-150 μm with an electromagnetic sample preparation crusher. Hour 1 minute 45 seconds, ultrasonic water immersion, leaching in a water bath at 70 ℃ for 60 minutes, the leaching liquid to solid ratio is 3:1 (mL / g), after filtration, the filter cake is washed once with 1.5 times the water, the filter residue is dried and weighed. Sampling analysis of WO 3 Content, and calculate the extraction rate of tungsten. The filter residue analysis result is 0.15%, and the calculation method of the tungsten extraction rate is...

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Abstract

The invention discloses a method for extracting tungsten from low-grade ferberite. The method comprises the following steps: mixing ferberite powder with an auxiliary material to obtain a mixture, roasting the mixture to obtain clinker, adopting water to leach the clinker, and carrying out solid-liquid separation to obtain tungsten lixivium and leaching residue, wherein the auxiliary material is composed of magnesium salt and alkali metal salt, and the alkali metal salt comprises sodium carbonate. According to the method, on the condition that a carbon reducing agent is not added, a small amount of magnesium salt is initiatively added to realize disintegration of the ferberite structure; during the following leaching process, tungsten is leached in the form of soluable tungstate; in addition, the inventor also finds that as the carbon reducing agent is not added, on one hand, reductive decomposition of silicon salt, phosphor, ferric salt and other complicated salt is avoided, and lesscolloid is formed, and on the other hand, magnesium salt can play the role of a purifying agent during the leaching process; the both sides can greatly lower impurity content in the lixivium and alsoenable fine grinding of the clinker to be easier, filtering is smoother during the leaching process, and the technological difficulty is greatly lowered.

Description

Technical field [0001] The invention relates to a method for extracting tungsten from low-grade tungsten ore, and belongs to the technical field of separation and enrichment of low-grade tungsten. Background technique [0002] In nature, there are more than 20 kinds of tungsten ore that have been discovered, such as wolframite (Fe, Mn)WO 4 ), scheelite (CaWO 4 ), Tungsten (WO 3 ·H 2 O), sulfite (WS 2 ), tungsten lead ore (PbWO 4 )and many more. Among them, wolframite and scheelite are the main raw materials for industrial tungsten smelting. my country’s tungsten reserves still rank first in the world, but with the over-exploitation of tungsten resources and the increase in tungsten consumption, the reserves of tungsten resources have declined sharply, and many tungsten mine resources are nearly exhausted, making my country’s tungsten industry facing a severe shortage of raw tungsten. . From the perspective of tungsten resource endowment conditions, mining status and long-term st...

Claims

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Application Information

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IPC IPC(8): C22B1/08C22B1/06C22B3/04C22B34/36
CPCC22B1/06C22B1/08C22B3/04C22B34/36Y02P10/20
Inventor 郭春平文小强周有池刘雯雯王玉香袁德林普建
Owner GANZHOU NONFERROUS METALLURGICAL RES INST
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